8-K: Pinnacle West Outlines Robust Growth, Capital Plans

Pinnacle West Capital Corporation details strong Arizona economic growth, significant capital investments, and an improved regulatory environment in its latest investor presentation.

Summary

• Pinnacle West (PNW) and Arizona Public Service Company (APS) are participating in investor meetings in November 2025 to discuss their strategic and financial outlook.
• Arizona's economy is robust, with Maricopa County ranking high for economic development and population growth, driving strong customer demand.
• APS residential customer growth is projected at 2.0%-2.5% for 2025E and 1.5%-2.5% for 2026E, exceeding the national average.
• Weather-normalized retail sales growth has shown 8 consecutive quarters within the 4%-6% long-term guidance range, with Q3 2025 residential sales growth at 4.3% and YTD at 2.0%.
• Long-term sales growth guidance has been increased to 5%-7% and extended through 2030.
• The company plans significant investment opportunities, including new gas generation (up to 2 GWs), a $200 million incremental investment in Palo Verde nuclear capacity, and an additional $500 million in the Palo Verde capital program over 10 years.
• Cumulative transmission capital expenditure is projected to exceed $6 billion from 2025-2034 to support reliability and new resources.
• APS has filed a 2025 rate case application requesting a net revenue increase of $580 million, with a 13.99% customer net revenue impact on Day 1, and rates expected to be effective in the second half of 2026.
• The rate case proposes an allowed Return on Equity (ROE) of 10.70% and an equity layer of 52.35%.
• The long-term EPS growth target is 5%-7% CAGR off the original 2024 midpoint.
• Total capital investment for APS from 2025-2028 is projected at $10.35 billion.
• The company aims for core O&M to remain flat, with a goal of declining O&M per MWh, focusing on customer affordability.
• Annualized dividends per share have a ~3.7% CAGR, with a target payout ratio of 65-75%.
• Pinnacle West maintains solid investment-grade credit ratings (Moody's Baa1/Baa2, S&P BBB+/BBB+, Fitch BBB+/BBB).

Sentiment

Score: 8

Explanation: The filing presents a very positive outlook, emphasizing strong economic growth in its service territory, significant planned capital investments, an improved regulatory environment, and solid financial targets including EPS growth and dividend stability. While a rate case with a notable customer impact is mentioned, the overall tone and detailed plans suggest confidence in future performance and regulatory support.

Positives

• Robust Arizona economy and strong customer growth, particularly in Maricopa County, which is ranked top for economic development in 2025 by Site Selection Magazine.
• Residential customer growth projections (2.0%-2.5% for 2025E, 1.5%-2.5% for 2026E) are higher than the national average.
• Eight consecutive quarters of weather-normalized retail sales growth within the 4%-6% long-term guidance range, demonstrating consistent performance.
• Long-term sales growth guidance increased to 5%-7% and extended through 2030, indicating strong future demand.
• Improved regulatory environment with commitments from the Arizona Corporation Commission (ACC) for more consistent outcomes, improved ROE, and continued support for adjustor mechanisms.
• Significant investment opportunities in new gas generation (up to 2 GWs), Palo Verde nuclear capacity ($200 million incremental, $500 million over 10 years), and over $6 billion in transmission infrastructure.
• The System Reliability Benefit (SRB) Surcharge mechanism will expand capacity to self-build generation with reduced regulatory lag.
• Long-term EPS growth target of 5%-7% CAGR off the original 2024 midpoint, supporting competitive total shareholder return.
• Optimized capital plan driving strong rate base growth, with $10.35 billion in total capital investment for APS from 2025-2028.
• Focus on disciplined cost management and a goal of declining O&M per MWh, contributing to customer affordability.
• Proven dividend growth track record (~3.7% DPS CAGR) and attractive dividend yield, with a target payout ratio of 65-75%.
• Solid investment-grade credit ratings and healthy balance sheet targets (APS equity layer >50%, PNW FFO/Debt 14%-16%).
• Well-managed and stable debt maturity profile as of September 30, 2025.

Negatives

• The proposed 2025 rate case includes a customer net revenue impact of 13.99% on Day 1, which could face resistance from customers and stakeholders.
• The 2025 rate case rates are not expected to become effective until the second half of 2026, indicating continued regulatory lag despite efforts to reduce it.
• General economic uncertainties, including inflation, supply chain delays, increased expenses, and volatile capital markets, could impact future results.

Risks

• Uncertainties associated with the current and future economic environment, including economic growth rates, labor market conditions, tariffs, inflation, supply chain delays, increased expenses, and volatile capital markets.
• Ability to manage capital expenditures and operations and maintenance costs while maintaining reliability and customer service levels.
• Ability to meet current and anticipated future needs for generation and associated transmission facilities, including due to unprecedented demand from high load factor customers.
• Direct or indirect effect on facilities or business from cybersecurity threats or occurrences.
• Variations in demand for electricity due to weather, seasonality, general economy, social conditions, customer and sales growth (or decline), energy conservation measures, distributed generation, and technological advancements.
• Potential effects of climate change on the electric system, including weather extremes such as prolonged drought and high temperature variations.
• Power plant and transmission system performance and outages.
• Competition in retail and wholesale power markets.
• Regulatory and judicial decisions, developments, and proceedings; new legislation, ballot initiatives, and regulation or interpretations of existing legislation or regulations.
• Fuel and water supply availability.
• Ability to achieve timely and adequate rate recovery of costs through rates and adjustor recovery mechanisms.
• Ability of APS to meet renewable energy and energy efficiency mandates and recover related costs.
• Ability of APS to achieve its clean energy goal to be carbon-neutral by 2050 and the impact of such achievement.
• Risks inherent in the operation of nuclear facilities, including spent fuel disposal uncertainty.
• Catastrophic events such as data security breaches, terrorist attacks, physical attacks, severe storms, fires, explosions, or pandemic health events.
• Development of new technologies which may affect electric sales or delivery, including delays in their development and application.
• Cost of debt, including increased cost as a result of rising interest rates, and equity capital, and the ability to access capital markets when required.
• Environmental, economic, and other concerns surrounding coal-fired generation, including regulation of greenhouse gas emissions.
• Volatile fuel and purchased power costs.
• Investment performance of the assets of nuclear decommissioning trust, captive insurance cell, coal mine reclamation escrow, pension, and other postretirement benefit plans.
• Liquidity of wholesale power markets and the use of derivative contracts.
• Potential shortfalls in insurance coverage.
• New accounting requirements or new interpretations of existing requirements.
• Generation, transmission, and distribution facilities and system conditions and operating costs.
• Willingness or ability of counterparties, power plant participants, and power plant landowners to meet contractual or other obligations or extend rights for continued power plant operations.
• Restrictions on dividends or other provisions in credit agreements and ACC orders.

Future Outlook

Pinnacle West projects long-term EPS growth of 5%-7% CAGR off its original 2024 midpoint, supported by an optimized capital plan driving strong rate base growth and an improved regulatory environment. The company aims to maintain a healthy capital structure, manage O&M costs for customer affordability, and deliver competitive shareholder dividends. Significant investments are planned for new generation and transmission to meet growing demand in Arizona, with a clean energy goal to be carbon-neutral by 2050.

Management Comments

• "We are focused on maintaining customer affordability."
• "Our investor goals going forward: Long-term EPS growth of 5%-7% off original 2024 midpoint, supporting competitive total shareholder return."
• "Optimized capital plan to reliably serve growing service territory, driving strong rate base growth and supported by SRB."
• "Managing a healthy capital structure with accretive equity to support investment."
• "Declining O&M per MWh with focus on customer affordability."
• "Competitive shareholder dividend."
• "Solid balance sheet and credit ratings."
• "We have a stable foundation with solid execution going forward."

Industry Context

Arizona, particularly Maricopa County, is experiencing robust economic development and population growth, making it an attractive service territory for utilities. This growth is driven by factors like affordable housing, strong economic development rankings, and a skilled workforce from major universities. The demand for electricity is increasing significantly, requiring substantial infrastructure investment, especially for large commercial and industrial (C&I) customers. The regulatory environment in Arizona appears to be improving, with the Arizona Corporation Commission (ACC) showing support for mechanisms that reduce regulatory lag and improve cost recovery for utilities.

Comparison to Industry Standards

• APS Residential Growth (2.0%-2.5% for 2025E, 1.5%-2.5% for 2026E) is projected to be higher than the National Avg.-Residential (2.0%-2.5% for 2025E, 1.5%-2.5% for 2026E) based on the 2025 Itron Annual Energy Survey Report.
• Phoenix housing is affordable compared to major cities in the region, contributing to sustained population and customer growth.
• Maricopa County ranked as the top county for economic development in 2025 by Site Selection Magazine, indicating a strong business environment.
• The U.S. Census ranked Maricopa County third among U.S. counties for growth, highlighting significant demographic expansion.
• Phoenix is ranked #1 out of 15 top growth markets for manufacturing by Newmark Group, a global real estate firm, signaling strong industrial sector expansion.
• Arizona State University ranked #1 in Innovation for the 11th straight year by U.S. News and World Report, supporting a skilled labor force.
• Phoenix remains #1 as the best positioned industrial real estate market by Commercial Caf Report, indicating robust commercial activity.
• APS rates have remained well below the rate of inflation (CPI and CPI (PHX)) from 2018-2024, with an average annual change of 2.53% for APS rates compared to 3.78% for CPI and 4.75% for CPI (PHX), demonstrating a focus on customer affordability relative to broader economic trends.

Corporate Governance

Stakeholder Impact

• Shareholders: Expected long-term EPS growth of 5%-7% and a competitive dividend (~3.7% CAGR) with a target payout ratio of 65-75% suggest positive returns and a commitment to shareholder value. The optimized capital plan and strong rate base growth are expected to drive future earnings.
• Customers: The proposed 2025 rate case includes a 13.99% net revenue increase on Day 1, which will impact customer bills. However, the company emphasizes maintaining affordability through disciplined cost management, customer growth, innovative programs, and a balanced capital plan. Investments in reliability and new generation aim to ensure continued high-quality service.
• Employees: Significant capital investments in generation and transmission infrastructure, along with ongoing operations, may lead to job creation or stability in construction, engineering, and operational roles.
• Regulators (ACC): The company is actively engaging with the ACC on rate cases, formula rates, and other regulatory matters, indicating a collaborative approach to achieving constructive outcomes that balance company needs with customer interests.

Next Steps

• Pinnacle West will be participating in various meetings with securities analysts and investors in November 2025.
• APS will file its 2025 Power Supply Adjustor (PSA) rate reset in November 2025.
• The ACC filing of the Annual Update for the Formula Rate Adjustment Mechanism (FRAM) is due on or before July 31 annually.
• The 2025 Rate Case hearing is scheduled to begin May 18, 2026, with a Final Decision scheduled for Q4 2026.
• The 2026 PSA rate reset will be effective March 1, 2026.
• The Transmission Cost Adjustor is to be filed May 15, 2026, for a June 1 effective date.
• The 2026 Lost Fixed Cost Recovery (LFCR) is to be filed July 31, 2026, and will be effective November 1, 2026 (if approved).
• An updated Resource Comparison Proxy (RCP) calculation will be filed May 1, 2026, effective September 1, 2026.
• The 2027 Renewable Energy Standard (RES) Implementation Plan is to be filed July 1, 2026.
• The 2026 Demand Side Management (DSM) Implementation Plan is to be filed (TBD).
• A second ACC Nuclear Issues workshop is to be held (TBD).
• A new gas pipeline is expected to be in service by late 2029.
• Continued investment in the Palo Verde capital program of approximately $500 million over the next 10 years.
• Ongoing distribution system upgrades, mesh pole wrapping, expulsion limiting fuses, and steel poles as part of grid hardening investments.

Key Dates

Recommendation

The filing outlines a compelling growth story driven by a robust Arizona economy and significant planned capital investments in generation and transmission infrastructure. The improved regulatory environment, including the adoption of a Formula Rates Policy Statement and support for adjustor mechanisms, is expected to reduce regulatory lag and provide more consistent cost recovery. The company's long-term EPS growth target of 5%-7% and commitment to a competitive dividend, coupled with a solid balance sheet and investment-grade credit ratings, make it an attractive investment for long-term growth and income. While the proposed rate increase will impact customers, the overall strategic direction and financial health indicators are strong.

Keywords

Pinnacle West, Arizona Public Service, APS, utility, electric company, energy, power, capital expenditure, rate case, regulatory, EPS growth, dividend, credit rating, clean energy, carbon-neutral, nuclear, transmission, generation, Maricopa County, economic development, customer growth, sales growth, O&M, System Reliability Benefit Surcharge, Formula Rate Adjustment Mechanism